Clarify in docs what models support Copilot Chat skills (#53667)

Co-authored-by: Sophie <[email protected]>

Author: timrogers

content/copilot/using-github-copilot/asking-github-copilot-questions-in-github.md

@@ -35,7 +35,7 @@ On {% data variables.product.github %}, you can use {% data variables.product.pr
 
 ## Powered by skills
 
-{% data variables.product.prodname_copilot_short %} is powered by a collection of skills that are dynamically selected based on the question you ask. You can tell which skill {% data variables.product.prodname_copilot_short %} used by clicking {% octicon "chevron-down" aria-label="the down arrow" %} to expand the status information in the chat window.
+When using the GPT-4o and {% data variables.copilot.copilot_claude_sonnet %} models, {% data variables.product.prodname_copilot_short %} has access to a collection of skills to fetch data from {% data variables.product.github %}, which are dynamically selected based on the question you ask. You can tell which skill {% data variables.product.prodname_copilot_short %} used by clicking {% octicon "chevron-down" aria-label="the down arrow" %} to expand the status information in the chat window.
 
 ![Screenshot of the {% data variables.product.prodname_copilot_short %} chat panel with the status information expanded and the skill that was used highlighted with an orange outline.](/assets/images/help/copilot/chat-show-skill.png)
 
@@ -71,7 +71,7 @@ The skills you can use in {% data variables.product.prodname_copilot_chat_dotcom
 
 ### Limitations of AI models for {% data variables.product.prodname_copilot_chat_short %}
 
-* If you want to use the skills listed in the table above{% ifversion ghec %}, or knowledge bases{% endif %}, on the {% data variables.product.github %} website, you must use the `gpt-4o` model.
+* If you want to use the skills listed in the table above{% ifversion ghec %}, or knowledge bases{% endif %}, on the {% data variables.product.github %} website, only the GPT 4o and {% data variables.copilot.copilot_claude_sonnet %} models are supported.
 * Experimental pre-release versions of the models may not interact with all filters correctly, including the duplication detection filter.
 
 ### Changing your AI model